its authors are mostly Muhammadiyah leaders, but one of them is actually a NU ulama from a famous pesantren. (Adnree Feillard observed this on October 7th, 2000 in Yogyakarta)

A group of people lined up on a table in front of the audience as guarantee of their authoriy

As a result, the Muhammadiayh reformists were using traditionalist Islam as theological support in a debate against Persis radicals (Andree Feillad 166)breaking the long association between Persis and Muhammadiyah